The document discusses mobile app development specifically for Apple's iOS, covering the evolution of mobile capabilities and various operating systems. It highlights the requirements for iOS development, such as Apple's Xcode tools and Objective-C programming language, as well as best practices for app lifecycle management and user interface design. The document also includes details on creating a simple app and considerations for device orientation and crash management.

1. Mobile App
Development
With Apple iOS
-Presented By Remesh Govind.

2. Mobile History
● Mobiles have moved up with capabilities
● Simple Mobile
● To More Compact
● To Smart Phones
● Operating Systems
○ Embedded (custom)
○ J2ME
○ Android
○ Apple iOS
○ Symbian
○ BlackBerry OS

3. J2ME
Java Based
Portable (based on version)
-- Connected Limited Device Configuration (CLDC)
Does not have many classes from J2SE
● JVMs
● Brew
● Sun
● Other Vendor

4. Android
Google Tech
Open Handset Alliance based ( AT&T, Verizon
etc)
Open Source
Java and Non Java based development.
Java
- SDK
Non-Java
- NDK ( Native Development Kit )

5. Symbian
Symbian ( 2009 - Royalty Free - Symbian
Foundation)
Symbian acquired by Nokia
- Nokia acquires QT.
- Adds QT Support to Symbian
Excellent Platform
- J2ME Support
- C/C++ based development

6. BlackBerry
Blackberry.
Excellent Devices for Business.
- IMHO this is a panic reaction
- Not doing so well ( BB tab was being sold a
15 K INR last X'Mas)
- Java Based development
- Limited API
- Need you to consume BB service.

7. Apple ( iOS 5.x)
Apple uses ARM based Processors
Operating System is called iOS.
Current Major Version 5.x
Last hardware released
- The New iPad.
-- Has more resolution than a HD TV !!
-- Same from factor( almost ) !!

8. Devices that can be used
iPhone 3
- iPhone 3 arm v6,
- 3GS armv7
iPhone 4
iPad ( iPad , iPad 2 the new iPad) - Ax
- new iPad uses Arm A5X processor
- iPod
- 4th Gen +

9. What is needed
● Apple Mac Box
● Apple iOS Device
● Apple Xcode

10. Tools
● XCode
○ IDE
● Instruments
○ Testing and Analytics Tool
● Interface Builder
○ User To build UI ( .xib ) files
● Language Objective C

11. Application
Entry Point
-main()
● Create Applciation Class Object
● Create Delegate to manage Application
Events
● Create Views ( Screens)
○ Manage Event Life cycles

12. Views - Life Cycle
● init /initWithNibName
● didLoad
● willAppear
● didAppear
● shouldAutorotateToInterfaceOrientation
● viewWillDisappear
● viewDidUnload
● didReceiveMemoryWarning ( any time !)

13. Fences
● Application load
○ Has 20 secs to start
○ Any Later - App will be Killed/ operation stopped.
● Forbes 214 Million app launch tests
○ iOS Likely to crash more often than Android.

14. Crash Reports on Start
Source : Forbes

15. Plan for crashes
Save User Data.
- Database
- App Storage ( NSUserDefaults / Android
SharedPreferenes )

16. Demo
Creation of Simple App
- Tool XCode
- Lets Watch the demo

17. DataTypes
Common (C / C++)
int
long
float
double
chat
Objects:
NSString
NSArray/ NSMutableArray
More .....

18. Hello World
- (void)viewDidLoad
{
[super viewDidLoad];
// Release any retained subviews of the main
view.
NSLog( "Hello World");
}

19. Interface Builder
Create UI
● Different For iPad and iPhone
● App needs to detect current device &
orientation
Orientation : Human Interface Guidelines -
Support Both versions of same orientation
atleast.
● LandscapeLeft/LandScapeRight
● Portrait / PortraitUpsideDown

20. Orientation Demo
-(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)
interfaceOrientation
{
return (interfaceOrientation == UIInterfaceOrientationPortrait ||
interfaceOrientation == UIInterfaceOrientationPortraitUpsideDown );
}

21. Button Click
Hello World Button
Button Types Image
[btnSend setImage:[UIImage imageNamed:@"home.png"] forState:
UIControlStateNormal];
Rounded Rect:
[btnSave setTitle:@"Go" forState:UIControlStateNormal];
DEMO !

22. Universal Apps
● Universal Apps
Demo !

23. Load a new View
Demo!

24. More Demos and Discussions if time permits!